Improvement in combined injector and ejector



L. B. FULTON.

Combined Injector and Ejectoln No. 220,471.

Patented Oct. 14, 1879.

N. PETERS. PHOTO-UTHOGRAPHER. WASHINGTON. D C,

NrrnD rara-s PATENT OFFICE;

LOUIS B. FULTON, OF PITTSBURG, PENNSYLVANIA.

IMPROVEIVIENT -IIN JCtOiVlBlbFED INJECTO'R AND EJ ECTOR.

Specification forming part of Letterslatent N0. 220,471, dated October 14, 1879; application filed March 31, 1879.

To all whom it may concern:

Be it known that I, LOUIS B. FULTON, of Pittsburg, county of Allegheny, State of Pen-nsylvania, have invented or discovered a new and useful lImprovement in Combined Injector and Ejector; and I do hereby declare the 'following to be a full, clear, concise, and exact description thereof, reference being had to the accompanying drawings,making a part of this specification, in which-like letters kindicating like parts- Figure 1 is a longitudinal vertical sectional view of my combined injector and ejector, the several ,parts `being arranged for use as an injector.. Fig. 2 is -a` similar view, except that the interior devices are shown in `elevation and adjusted for u'seas an ejectoror Siphon-pump. Fig. 3 is a transverse sectional viewthrough the overtlow-chamber and .overflow-port, looking toward `the in'lowend'; and Fig. 4is a vertical sectional view through the overiiow port and valve, illustrative .of a modified forni of construction.

My invention relates to a combined injector and ejector or pump, `and consists in such an arrangement of the several parts that by the adjustment of` the same at the pleasure Vof the operator the device may be adapted for;use as an injector for feeding Water to asteamj-boiler, or as an ejector or siphon-pumpfor `raising and discharging .larger bodies or :columns of water.

In the drawings, A Al represents the main outer casing, one end, A1., of which is inclosed Within a casing head orV shell, B, giving an annular chamber, I), between A1 and B. The projecting end of this shell B is threaded both inside and outside,theouter threads being used for coupling the device to a `steam-pipe, and the inner threads being used to secure the steam-jet nozzle. This nozzle has an inwardlyprojecting nozzle-tube, D, connected to an annular base, d, which has an enlarged collar, d1, fitted against a corresponding shoulder, d2, on the interior of the shell, and an annular nut, d3, screwing into theinnerthreads of the shell, binds Athe ,nozzle in place. I prefer to give the interior of this nozzle a tapering or flaring form, the discharge end being larger than the receiving end, and it is extended forward into or within the end of the casing Al and combining-tube C. This combining -tube is arranged to fit nicely within the bore or chamber of the casing A A1, -so as practically to afford a water-tight packing, but yet so as to be moved endwise back and forth within the casing. The end opening c of this tube C, adjacent to the nozzle D, is conical or lipped in form, as shown, and the interior passage or bore c1 is approximately the size of the discharge end of the nozzle, so that as the combining-tube is moved toward the nozzle the Water-inflow passage around lthe nozzle will be wholly or partially closed, and by moving in the opposite direction such passage will be enlarged, thus opening or closing in Whole or in part this feed or inflow water passage from the annular chamber b, this chamber being supplied by inflowport E, and in so doing the steam-jet will not be vincreased or diminished thereby, but will remain ypractically constant.

The tube C is moved back and forth toward and from the nozzle D by pin l1, working in a circumferentialgroove, h1, cut in the outer surface of the tube. This pin is secured to the end of a stem, H, near its periphery, or at such distance from the center as to give to the tube the desired amount of throw or endwise movement as the stem is turned. This stem passes through casing A1 and outer shell, B, and is guided and held bya projecting rim, B', and screw-cap H1, bearin g against a collar, h2, on `the stem.

To the upper protruding end of the stem any suitable lever or handle, H2, may be attached for convenience in operating-the tube G. The length ot this tube should, by preference, be sufficient to secure the requisite lift when the apparatus is used as an ejector or pump-say from two to three inches in a device of the scale shown. Its dischargeend opening c2 may also be madeconical or lipped, as shown, in order to facilitate discharge from such end; but when the device is used as an injector I make use of a separate endwisemovable dis charging tube, S S.

rlhe reduced end of the part S, adjacent to the tube G, is arranged to enter the bore of such tube like a telescope-joint, as in Fig. 1, but to withdraw out of the same, as in Fig. 2, when desired. When arranged and adjusted as in Fig. 1 `this telescoping part of the discharging-tube forms in ell`ect a continuation of the combining-tube, giving a gradually reduced or tapering passage from the mouth of nozzle 1) toward the discharge.

At the discharge end ofthe part S is an enlarged head, in the upper surface of which is atransverse notch or groove, receiving a pin, n. This pin is attached to the end ot' a stem, N, out of its rotating center, and as such stem is turned or rotated the discharging-tube receives an eiidwise throw or motion. This stem is secured in a manner similar to the stem H, A2 being the surrounding rim extending up from the casing A, 1N" the cap screwing down upon the collar n, and X the operatingl1andle.

By preference the size of the stem 1N' and eccentric position of the pin n are such as to give the tube S S' a greater range ot' motion than the tube C, or suiiicient to give it the positions shown in Figs. 1 and 2.

Within the head s is an enlarged chamber or space, s, communicating by openings s2 with the open space between the tube S S and case A, and thus with overliow-port 1t. lThe part S screws into the end of S or chamber si, and continues the discharge-passage from the chamber.

Alipped or conical mouth, u, is made at the receiving end ol' S', opening into chamber sl, to reduce friction, and from the throat u the passage gradually expands into the usual bell or conical mouth discharge u2. The outer surface, m, of this end of the discharging-tube is made to Iit nicely into the shoulder or ring c2 when the tube is adjusted as in Fig. 1 also, the edge of a collar, m', on the end of the tube fits against the outer face of this shoulder, thus making a tight packing at that point when thus arranged, and closing comm unication with the chamber or space between A and S S, except through the overtiow-openings s2.

The tube S S' is guided in its endwise adjustment by wings or ribs v, extending longitudinally along the. part S', and bearing against the inner walls ot' the shell or easing, or against the face of the shoulder r2, and also, if desired, by additional ribs r, extending along the interior ot' the shell, and furnishing a bearing or guide for the enlarged head or chamber s. The tube S S will thus be held in place when withdrawn from the tube C, as shown in Fig. 2, and water ways or passages a' will at the same time be provided outside of this dischargingtube, whereby the body ot' water escaping from the open discharge end of C, Fig. 2, will iind discharge outside of the tube S S', as well as through the tube; and to facilitate still further this outside discharge, perforations o may be made through the head s in any desired number.

The overflow-port 1t is controlled by a valve, r, closing against a seat, r', and operating within the valve-chan1ber 1t', which is inclosed by the rim K, extending down from casing A. An extension feirule or guide, K', screws into this rim K, and within it is a hollow lult or tube, W, working in screwthreads u".

The valve r is attached by bars w to a hollow guide or stem, W', which rests on the upper end ot' nut \V. By screwing up this nut W the valve r will be seated and the overow port closed; or by partially unscrewing the nut the valve will descend by its own weight, unless held up by suction from within. Such suction will exist when the supply of water is below the capacity of the instrument; but when the supply of water is in excess, such excess will pass through the openings s2, or out of the open end otl tube C, when arranged as in Fig. 2, and thence to overtlow-port R, and, pressing upon valve r, will open it and escape through hollow stein W' and nut W. By moving the tube C toward the nozzle D the supply of water maybe reduced to the capacity of the instrument, as indicated by the amount of this overtiow. And, again, if from any cause the proper working of the device is interrupted. the steam, or steam and water, will open this valve, the nut Vv' being unscrewed, and the steam escaping will give notice of such interruption.

This form of overliow-valve is designed more especially for use with the device when it is employed as a siphoirpump or ejector, as by closing the valve by screwing up nut W the entire watersupply will be passed to the discharge end of the device; but it may also be used when the device is used as an injector `for supplying water to hoilers,-and especially wherever there is danger that the water-supply maybecoine frozen, as by closing this valve as against inside pressure, and turning on a small jet or supply of hot steam through nozzle D, such steam will be passed back into the water-tank, and warm the water therein.

When, however, the device is used as an injector, and especially' as a non-lifting injector, a modited form of overflow-valve (shown in Fig. 4) may be used, in which A is the shell or casin g, K the rim iuclosing the valve-chan1 ber 0', and 0 is a short tube screwing into the port lt and extending down inside the rim K. 0n the bottom of the tube O is an enlarged head, P, with a series of perforations, oz, made through the upper face or rim, o, outside of the tube 0, which perforations furnish an ontlet for such tube into the chamber 0', and thence to the port below: Au annular gravityvalve, p, is arran ged inchamberO, which seats upon the face ol, and closes the perforations o2. When pressure in the tube O is suicient to raise the valve p the overow will escape; otherwise the weight of valve p and the suction from within will both tend to hold it to its seat o.

Advantages attending this form of overowvalve are, cheapness of construction and the arrangement by which the weight of the valve supplements the suction from within in holding the valve to its seat.

Instead ot making the tube S slide inside the tube C, as shown, it may be arranged to l slide on or outside of tube C, and thereby form one continuous passage through the tubes when the tube S S' is moved toward tube (l, and when moved from it to withdraw from tube C, or open a discharge-passage outside of and around it; and in eieeting this it is not essential that tube S S' should he entirely withdrawnfrom tube C, as water ways or ports may be made leading from the interior of tube C to the space between the tube S S' and shell A, and the telescoping end of tube S be so arranged as to cover or uncover such ports or ways as the tube is adjusted or moved 5 and such modifications I consider as coming within my invention.

The best manner of operating my invention will depend somewhat upon the work to be done.

First. When used as a Siphon-pump or ejector to raise and discharge or force a large stream of water into the open air, the dischargingtube S S' is moved as in Fig. 2, so as to open discharge-passages both inside and outside or around such tube, as described. The tube Gis adjusted so as to open the iniiow-water port around nozzle D, and, by preference, the overiiow-valve is opened a little. Steam is then turned on through nozzle D, and, suitable connection being made from port E to water-supply, water will be drawn into and carried through the tube U by the action of the steam, and the greater portion of such water will be forced through and around the tube S S', and discharged from the opposite end of the ejector. A small portion lwill, however, iind its way through the open valve r, and the skilled workman, by testing the temperature of such overflow, can adjust the tube G by turning lever H2, so as to regulate the water-supply to the steam-jet without aecting such jet. In this way the device can be made to work as an ejector and forcepump with the greatest economy. The desired adjustment of C being determined, the valve o' may be closed byscrewing up nut W, and the entire water-supply be passed through the discharge or open end of the instrument.

Second. When used as a lifting-injector for feeding water to a steam-boiler, connection is made from port E to water-supply and from the discharge-end to boiler by screw-thread connection et, or otherwise. The several parts are then adjusted, as in Fig. 2, as though intended for ejecting, and steam turned on, the boiler-connection being closed by a check-valve or otherwise. As soon as water has been lifted and the instrument iilled therewith, which can be determined by the overflow at r, the lever and tube S S' are shifted, as in Fig. l, so as to secure a single inside passage, as described, when, by opening the boiler-connection, water will be forced into it through such passage by the action of the steam-jet. By observing the amount of overflow the tube C may be shifted or adjusted by lever H2, so as to regulate the water-supply as desired.

Third. When used as an injector without lifting the water-supply, the parts are adjusted as in Fig. 1, preferably using the form of overflow-valve shown in Fig. 4, and by observing the amount of overflow through such valve the tube C may bc adjusted so as to regulate the water-supply as desired.

By making the nozzle D conical in form, with its interior unobstructed, I secure a discharging-orifice of an area in cross section equal, or nearly equal, to that of the combining-tube C, while the inflow end of D, being smaller, limits the size of the jet or quantity of steam passing through the nozzle; and by this construction I not only secure the best condition of the steam at the lifting-point of action for effecting such lift, but also, on account of the relative areas of combining-tube and nozzle, the water-supply alone may be reduced or increased without corresponding reduction or increase of the steam-jet, and thereby secure the best results in both lifting a column or stream of water and ejecting or forcing the same from the discharge end of the instrument.

The same device is thus adapted for use not only as an injector and ejector, but also as a force-pump to throw a comparatively large stream of water, and may be used for extinguishing fires as well as for the ordinary uses of injectors and ejectors.

I claim herein as my inventionl. In a combined injector and ejector, an endwise-movable discharging-tube, adapted by its adjustment in one direction to close communication between the interior passage and the space or chamber surrounding such tube, and by its adjustment inthe opposite direction to open such end communications, and having ports or passages a' c, 011e or more, past and outside of the same, in combination with such combining-tube, and with the nozzle D and overflow R, substantially as set forth.

2. In combination with the combining-tube of an injector or ejector, an endwise-movable discharging-tube, adapted by its movement in one direction to connect with the combining tube and form a single continuous water-passage through both tubes, and by its movement in the opposite direction to open dischargepassages both inside and outside of the discharging-tube, leading to a common discharge beyond the discharging-tube, substantially as set forth.

3. The combination of a valve, r, adapted to open and close the overflowport It, valvechamber R', hollow stem W', having openings from its interior to the valve-chamber, a separate supporting hollow nut, W, and guide or ferrule K', substantially as set forth.

4. In combination with an injector, an overiiow-tube, O, leading from the overflow-port, having enlarged head P, annular valveseat 01, and one or more ports, o2, and annular valve p, adapted by its own weight and by suction from within to seat upon ol and close the port or ports, substantially as set forth.

5. The endwise-adjustable combining-tube combination with the nozzle D, also having a C, in combination with the dischargingtnbe S S', also adjustable endwise, and adapted to make in one adjustment a close connection with the adjacent end of the combining-tnbe, 0r, being adjusted away, to make a more or less open passage between it and such adjacent end of tube C, thereby opening passages both inside and outside the tube S S', which lead to a common discharge, and in further variable relation with reference to the adjacent Haring end of the tube C by the adjustment of the latter, substantially as set forth.

In testimony whereof I have hereunto set my hand.

LOUIS B. FULTON. Witnesses:

R. H. WHITTLESEY, C. L. PARKER. 

